Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

I was wanting to make sure that everything lined up on both sides of a board -- easily. I thought a solution would be to make a registration hole punch. I know the pro ones have cameras looking down the bore of the hole punch, but I wasn't exactly sure where to begin making a diy version of that.

I was thinking a solenoid with some sort of hole puncher, but I wouldn't know where to get precise equipment for the puncher itself.

Any ideas?